Exhaust Emissions Monitoring

One of the main challenges in exhaust monitoring is the ability to monitor the emissions close to the engine exhaust. Traditional analytical instruments used for exhaust emissions are large, complex, and require to be operated in controlled environment. Since the instruments cannot be placed at/near the engine exhaust, long sampling lines equipped with pumping systems (usually heated to prevent condensation) are necessary.
Makel Engineering offers MEMS (MicroElectroMechanical Systems) based chemical sensors that can be operated at high temperatures, and therefore can be placed much closer to the engine's exhaust. Species monitored include CO, NOx, CO2, O2, and Hydrocarbons. Monitoring of the multiple species is based on several sensor platforms, each having a different sensing mechanism. MEMS based chemical sensors are compact and require very little power - offering the potential of being used not only for engine development, but also as on-board control and safety sensors. Similar sensing technology can be applied to the improvement of engines for automotive and stationary power applications as well.
As part of engine development efforts, the US Air Force conducts ground tests with aircraft jet engines. Currently these tests are performed with traditional analytical instruments equipped with pumping systems to drive the exhaust sample through long heated sampling lines. Makel Engineering has ongoing research sponsored by the Air Force to develop and demonstrate an exhaust monitoring system based on our high temperature MEMS sensors. The program includes several field demonstrations placing the sensors in close proximity to the engine exhaust.